Vulnerability-Lookup

CVE-2026-78145 (GCVE-0-2026-78145)

Vulnerability from cvelistv5 – Published: 2026-08-23 22:45 – Updated: 2026-08-23 22:45 X_Open Source

Title

CTFd __init__.py _is_safe_url redirect

Summary

A vulnerability has been found in CTFd up to 3.8.4. The affected element is the function _is_safe_url of the file CTFd/utils/validators/__init__.py. Such manipulation of the argument Next leads to open redirect. The attack can be launched remotely. The exploit has been disclosed to the public and may be used. The name of the patch is 5d8515842fd1ab2c3a9f2dde9ffca907aa334ea9. Upgrading the affected component is recommended.

Severity

5.3 (Medium)


                        
                          CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:P

4.3 (Medium)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N/E:P/RL:O/RC:C

4.3 (Medium)


                        
                          CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N/E:P/RL:O/RC:C

CWE

CWE-601 - Open Redirect

Assigner

VulDB mitre root

References

9 references

URL	Tags
https://vuldb.com/vuln/394533	vdb-entrytechnical-description
https://vuldb.com/vuln/394533/cti	signaturepermissions-required
https://vuldb.com/cve/CVE-2026-78145	third-party-advisory
https://vuldb.com/submit/882469	third-party-advisory
https://mblunt.dev/writeups/ctfd-open-redirect/	exploit
https://github.com/CTFd/CTFd/pull/3026	issue-trackingpatch
https://github.com/CTFd/CTFd/commit/5d8515842fd1a…	patch
https://github.com/CTFd/CTFd/releases/tag/3.8.4	patch
https://github.com/CTFd/CTFd/	product

Impacted products

1 product

Vendor	Product	Version	CPE status
n/a	CTFd	Affected: 3.8.0 Affected: 3.8.1 Affected: 3.8.2 Affected: 3.8.3 Affected: 3.8.4 cpe:2.3:a:ctfd:ctfd::::::::

Credits

mblunt (VulDB User)

Show details on NVD website

JSON

To clipboard

{
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    "cna": {
      "affected": [
        {
          "cpes": [
            "cpe:2.3:a:ctfd:ctfd:*:*:*:*:*:*:*:*"
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          "product": "CTFd",
          "vendor": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "3.8.0"
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            {
              "status": "affected",
              "version": "3.8.1"
            },
            {
              "status": "affected",
              "version": "3.8.2"
            },
            {
              "status": "affected",
              "version": "3.8.3"
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        }
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          "lang": "en",
          "value": "A vulnerability has been found in CTFd up to 3.8.4. The affected element is the function _is_safe_url of the file CTFd/utils/validators/__init__.py. Such manipulation of the argument Next leads to open redirect. The attack can be launched remotely. The exploit has been disclosed to the public and may be used. The name of the patch is 5d8515842fd1ab2c3a9f2dde9ffca907aa334ea9. Upgrading the affected component is recommended."
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      "metrics": [
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      "title": "CTFd __init__.py _is_safe_url redirect",
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  },
  "cveMetadata": {
    "assignerOrgId": "1af790b2-7ee1-4545-860a-a788eba489b5",
    "assignerShortName": "VulDB",
    "cveId": "CVE-2026-78145",
    "datePublished": "2026-08-23T22:45:11.793Z",
    "dateReserved": "2026-08-23T06:27:57.055Z",
    "dateUpdated": "2026-08-23T22:45:11.793Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2026-78145\",\"sourceIdentifier\":\"cna@vuldb.com\",\"published\":\"2026-08-23T23:16:46.043\",\"lastModified\":\"2026-08-23T23:16:46.043\",\"vulnStatus\":\"Received\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"A vulnerability has been found in CTFd up to 3.8.4. The affected element is the function _is_safe_url of the file CTFd/utils/validators/__init__.py. Such manipulation of the argument Next leads to open redirect. The attack can be launched remotely. The exploit has been disclosed to the public and may be used. The name of the patch is 5d8515842fd1ab2c3a9f2dde9ffca907aa334ea9. Upgrading the affected component is recommended.\"}],\"affected\":[{\"source\":\"cna@vuldb.com\",\"affectedData\":[{\"vendor\":\"n/a\",\"product\":\"CTFd\",\"cpes\":[\"cpe:2.3:a:ctfd:ctfd:*:*:*:*:*:*:*:*\"],\"versions\":[{\"version\":\"3.8.0\",\"status\":\"affected\"},{\"version\":\"3.8.1\",\"status\":\"affected\"},{\"version\":\"3.8.2\",\"status\":\"affected\"},{\"version\":\"3.8.3\",\"status\":\"affected\"},{\"version\":\"3.8.4\",\"status\":\"affected\"}]}]}],\"metrics\":{\"cvssMetricV40\":[{\"source\":\"cna@vuldb.com\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"4.0\",\"vectorString\":\"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X\",\"baseScore\":2.1,\"baseSeverity\":\"LOW\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"attackRequirements\":\"NONE\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"PASSIVE\",\"vulnConfidentialityImpact\":\"NONE\",\"vulnIntegrityImpact\":\"LOW\",\"vulnAvailabilityImpact\":\"NONE\",\"subConfidentialityImpact\":\"NONE\",\"subIntegrityImpact\":\"NONE\",\"subAvailabilityImpact\":\"NONE\",\"exploitMaturity\":\"PROOF_OF_CONCEPT\",\"confidentialityRequirement\":\"NOT_DEFINED\",\"integrityRequirement\":\"NOT_DEFINED\",\"availabilityRequirement\":\"NOT_DEFINED\",\"modifiedAttackVector\":\"NOT_DEFINED\",\"modifiedAttackComplexity\":\"NOT_DEFINED\",\"modifiedAttackRequirements\":\"NOT_DEFINED\",\"modifiedPrivilegesRequired\":\"NOT_DEFINED\",\"modifiedUserInteraction\":\"NOT_DEFINED\",\"modifiedVulnConfidentialityImpact\":\"NOT_DEFINED\",\"modifiedVulnIntegrityImpact\":\"NOT_DEFINED\",\"modifiedVulnAvailabilityImpact\":\"NOT_DEFINED\",\"modifiedSubConfidentialityImpact\":\"NOT_DEFINED\",\"modifiedSubIntegrityImpact\":\"NOT_DEFINED\",\"modifiedSubAvailabilityImpact\":\"NOT_DEFINED\",\"Safety\":\"NOT_DEFINED\",\"Automatable\":\"NOT_DEFINED\",\"Recovery\":\"NOT_DEFINED\",\"valueDensity\":\"NOT_DEFINED\",\"vulnerabilityResponseEffort\":\"NOT_DEFINED\",\"providerUrgency\":\"NOT_DEFINED\"}}],\"cvssMetricV31\":[{\"source\":\"cna@vuldb.com\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N\",\"baseScore\":4.3,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"REQUIRED\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"LOW\",\"availabilityImpact\":\"NONE\"},\"exploitabilityScore\":2.8,\"impactScore\":1.4}],\"cvssMetricV2\":[{\"source\":\"cna@vuldb.com\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"2.0\",\"vectorString\":\"AV:N/AC:L/Au:N/C:N/I:P/A:N\",\"baseScore\":5.0,\"accessVector\":\"NETWORK\",\"accessComplexity\":\"LOW\",\"authentication\":\"NONE\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"PARTIAL\",\"availabilityImpact\":\"NONE\"},\"baseSeverity\":\"MEDIUM\",\"exploitabilityScore\":10.0,\"impactScore\":2.9,\"acInsufInfo\":false,\"obtainAllPrivilege\":false,\"obtainUserPrivilege\":false,\"obtainOtherPrivilege\":false,\"userInteractionRequired\":false}]},\"weaknesses\":[{\"source\":\"cna@vuldb.com\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-601\"}]}],\"references\":[{\"url\":\"https://github.com/CTFd/CTFd/\",\"source\":\"cna@vuldb.com\"},{\"url\":\"https://github.com/CTFd/CTFd/commit/5d8515842fd1ab2c3a9f2dde9ffca907aa334ea9\",\"source\":\"cna@vuldb.com\"},{\"url\":\"https://github.com/CTFd/CTFd/pull/3026\",\"source\":\"cna@vuldb.com\"},{\"url\":\"https://github.com/CTFd/CTFd/releases/tag/3.8.4\",\"source\":\"cna@vuldb.com\"},{\"url\":\"https://mblunt.dev/writeups/ctfd-open-redirect/\",\"source\":\"cna@vuldb.com\"},{\"url\":\"https://vuldb.com/cve/CVE-2026-78145\",\"source\":\"cna@vuldb.com\"},{\"url\":\"https://vuldb.com/submit/882469\",\"source\":\"cna@vuldb.com\"},{\"url\":\"https://vuldb.com/vuln/394533\",\"source\":\"cna@vuldb.com\"},{\"url\":\"https://vuldb.com/vuln/394533/cti\",\"source\":\"cna@vuldb.com\"}]}}"
  }
}

FKIE_CVE-2026-78145

Vulnerability from fkie_nvd - Published: 2026-08-23 23:16 - Updated: 2026-08-23 23:16

Severity

4.3 (Medium) - CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N

Summary

References

	URL	Tags
	cna@vuldb.com	https://github.com/CTFd/CTFd/
	cna@vuldb.com	https://github.com/CTFd/CTFd/commit/5d8515842fd1ab2c3a9f2dde9ffca907aa334ea9
	cna@vuldb.com	https://github.com/CTFd/CTFd/pull/3026
	cna@vuldb.com	https://github.com/CTFd/CTFd/releases/tag/3.8.4
	cna@vuldb.com	https://mblunt.dev/writeups/ctfd-open-redirect/
	cna@vuldb.com	https://vuldb.com/cve/CVE-2026-78145
	cna@vuldb.com	https://vuldb.com/submit/882469
	cna@vuldb.com	https://vuldb.com/vuln/394533
	cna@vuldb.com	https://vuldb.com/vuln/394533/cti

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "cpes": [
            "cpe:2.3:a:ctfd:ctfd:*:*:*:*:*:*:*:*"
          ],
          "product": "CTFd",
          "vendor": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "3.8.0"
            },
            {
              "status": "affected",
              "version": "3.8.1"
            },
            {
              "status": "affected",
              "version": "3.8.2"
            },
            {
              "status": "affected",
              "version": "3.8.3"
            },
            {
              "status": "affected",
              "version": "3.8.4"
            }
          ]
        }
      ],
      "source": "cna@vuldb.com"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "A vulnerability has been found in CTFd up to 3.8.4. The affected element is the function _is_safe_url of the file CTFd/utils/validators/__init__.py. Such manipulation of the argument Next leads to open redirect. The attack can be launched remotely. The exploit has been disclosed to the public and may be used. The name of the patch is 5d8515842fd1ab2c3a9f2dde9ffca907aa334ea9. Upgrading the affected component is recommended."
    }
  ],
  "id": "CVE-2026-78145",
  "lastModified": "2026-08-23T23:16:46.043",
  "metrics": {
    "cvssMetricV2": [
      {
        "acInsufInfo": false,
        "baseSeverity": "MEDIUM",
        "cvssData": {
          "accessComplexity": "LOW",
          "accessVector": "NETWORK",
          "authentication": "NONE",
          "availabilityImpact": "NONE",
          "baseScore": 5.0,
          "confidentialityImpact": "NONE",
          "integrityImpact": "PARTIAL",
          "vectorString": "AV:N/AC:L/Au:N/C:N/I:P/A:N",
          "version": "2.0"
        },
        "exploitabilityScore": 10.0,
        "impactScore": 2.9,
        "obtainAllPrivilege": false,
        "obtainOtherPrivilege": false,
        "obtainUserPrivilege": false,
        "source": "cna@vuldb.com",
        "type": "Secondary",
        "userInteractionRequired": false
      }
    ],
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 4.3,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "LOW",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "REQUIRED",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 2.8,
        "impactScore": 1.4,
        "source": "cna@vuldb.com",
        "type": "Primary"
      }
    ],
    "cvssMetricV40": [
      {
        "cvssData": {
          "Automatable": "NOT_DEFINED",
          "Recovery": "NOT_DEFINED",
          "Safety": "NOT_DEFINED",
          "attackComplexity": "LOW",
          "attackRequirements": "NONE",
          "attackVector": "NETWORK",
          "availabilityRequirement": "NOT_DEFINED",
          "baseScore": 2.1,
          "baseSeverity": "LOW",
          "confidentialityRequirement": "NOT_DEFINED",
          "exploitMaturity": "PROOF_OF_CONCEPT",
          "integrityRequirement": "NOT_DEFINED",
          "modifiedAttackComplexity": "NOT_DEFINED",
          "modifiedAttackRequirements": "NOT_DEFINED",
          "modifiedAttackVector": "NOT_DEFINED",
          "modifiedPrivilegesRequired": "NOT_DEFINED",
          "modifiedSubAvailabilityImpact": "NOT_DEFINED",
          "modifiedSubConfidentialityImpact": "NOT_DEFINED",
          "modifiedSubIntegrityImpact": "NOT_DEFINED",
          "modifiedUserInteraction": "NOT_DEFINED",
          "modifiedVulnAvailabilityImpact": "NOT_DEFINED",
          "modifiedVulnConfidentialityImpact": "NOT_DEFINED",
          "modifiedVulnIntegrityImpact": "NOT_DEFINED",
          "privilegesRequired": "NONE",
          "providerUrgency": "NOT_DEFINED",
          "subAvailabilityImpact": "NONE",
          "subConfidentialityImpact": "NONE",
          "subIntegrityImpact": "NONE",
          "userInteraction": "PASSIVE",
          "valueDensity": "NOT_DEFINED",
          "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
          "version": "4.0",
          "vulnAvailabilityImpact": "NONE",
          "vulnConfidentialityImpact": "NONE",
          "vulnIntegrityImpact": "LOW",
          "vulnerabilityResponseEffort": "NOT_DEFINED"
        },
        "source": "cna@vuldb.com",
        "type": "Secondary"
      }
    ]
  },
  "published": "2026-08-23T23:16:46.043",
  "references": [
    {
      "source": "cna@vuldb.com",
      "url": "https://github.com/CTFd/CTFd/"
    },
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      "source": "cna@vuldb.com",
      "url": "https://github.com/CTFd/CTFd/commit/5d8515842fd1ab2c3a9f2dde9ffca907aa334ea9"
    },
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      "source": "cna@vuldb.com",
      "url": "https://github.com/CTFd/CTFd/pull/3026"
    },
    {
      "source": "cna@vuldb.com",
      "url": "https://github.com/CTFd/CTFd/releases/tag/3.8.4"
    },
    {
      "source": "cna@vuldb.com",
      "url": "https://mblunt.dev/writeups/ctfd-open-redirect/"
    },
    {
      "source": "cna@vuldb.com",
      "url": "https://vuldb.com/cve/CVE-2026-78145"
    },
    {
      "source": "cna@vuldb.com",
      "url": "https://vuldb.com/submit/882469"
    },
    {
      "source": "cna@vuldb.com",
      "url": "https://vuldb.com/vuln/394533"
    },
    {
      "source": "cna@vuldb.com",
      "url": "https://vuldb.com/vuln/394533/cti"
    }
  ],
  "sourceIdentifier": "cna@vuldb.com",
  "vulnStatus": "Received",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-601"
        }
      ],
      "source": "cna@vuldb.com",
      "type": "Primary"
    }
  ]
}

GHSA-9X8R-FVQR-38VH

Vulnerability from github – Published: 2026-08-24 00:33 – Updated: 2026-08-24 00:33

Details

A vulnerability has been found in CTFd up to 3.8.4. The affected element is the function _is_safe_url of the file CTFd/utils/validators/init.py. Such manipulation of the argument Next leads to open redirect. The attack can be launched remotely. The exploit has been disclosed to the public and may be used. The name of the patch is 5d8515842fd1ab2c3a9f2dde9ffca907aa334ea9. Upgrading the affected component is recommended.

Severity

4.3 (Medium)


                  
                    CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N

2.1 (Low)


                  
                    CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:P

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2026-78145"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-601"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-08-23T23:16:46Z",
    "severity": "LOW"
  },
  "details": "A vulnerability has been found in CTFd up to 3.8.4. The affected element is the function _is_safe_url of the file CTFd/utils/validators/__init__.py. Such manipulation of the argument Next leads to open redirect. The attack can be launched remotely. The exploit has been disclosed to the public and may be used. The name of the patch is 5d8515842fd1ab2c3a9f2dde9ffca907aa334ea9. Upgrading the affected component is recommended.",
  "id": "GHSA-9x8r-fvqr-38vh",
  "modified": "2026-08-24T00:33:11Z",
  "published": "2026-08-24T00:33:11Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-78145"
    },
    {
      "type": "WEB",
      "url": "https://github.com/CTFd/CTFd/pull/3026"
    },
    {
      "type": "WEB",
      "url": "https://github.com/CTFd/CTFd/commit/5d8515842fd1ab2c3a9f2dde9ffca907aa334ea9"
    },
    {
      "type": "WEB",
      "url": "https://github.com/CTFd/CTFd"
    },
    {
      "type": "WEB",
      "url": "https://github.com/CTFd/CTFd/releases/tag/3.8.4"
    },
    {
      "type": "WEB",
      "url": "https://mblunt.dev/writeups/ctfd-open-redirect"
    },
    {
      "type": "WEB",
      "url": "https://vuldb.com/cve/CVE-2026-78145"
    },
    {
      "type": "WEB",
      "url": "https://vuldb.com/submit/882469"
    },
    {
      "type": "WEB",
      "url": "https://vuldb.com/vuln/394533"
    },
    {
      "type": "WEB",
      "url": "https://vuldb.com/vuln/394533/cti"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
      "type": "CVSS_V4"
    }
  ]
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.

Action not permitted

CVE-2026-78145 (GCVE-0-2026-78145)

FKIE_CVE-2026-78145

GHSA-9X8R-FVQR-38VH

Tags

Sightings

Nomenclature